I-cellulose ethers yiklasi ebalulekileyo yeekhompawundi ze-polymer ezisetyenziswa ngokubanzi kulwakhiwo, iingubo, amayeza kunye nezinye iindawo. Ubume bayo obukhethekileyo beekhemikhali kunye neempawu ezibonakalayo zinika inzuzo ebalulekileyo ekuphuculeni ukunamathela kunye neempawu zokwenza ifilimu.
1. Iimpawu ezisisiseko ze-cellulose ethers
I-ether ye-cellulose luhlobo lwepolymer e-soluble yamanzi efunyenwe ngokuguqulwa kweekhemikhali ze-cellulose yendalo. Isakhiwo sayo esisisiseko sikhonkco ye-macromolecular ehlanganiswe neeyunithi ze-β-D-glucose ezixhunywe ngamabhondi e-β-1,4-glycosidic. I-cellulose ethers eqhelekileyo ibandakanya i-hydroxypropyl methylcellulose (HPMC), i-methylcellulose (MC), i-carboxymethylcellulose (CMC), njl. .
2. Inkqubo yokuphucula ukubambelela
Ukwandisa i-interfacial adhesion: I-ether ye-cellulose inokwenza isisombululo esizinzileyo se-colloidal kwisisombululo. Esi sisombululo se-colloidal sinokusasazwa ngokulinganayo kumphezulu we-substrate, gcwalisa i-micropores yomhlaba, kwaye uphucule ukunamathela kobuso. Ngokomzekelo, ukongeza i-HPMC kwizinto zokwakha kunokuphucula ukunamathela phakathi kodaka kunye nesiseko sezinto, okwenza udaka lubambelele ngokuqinileyo eludongeni.
Ukuphucula ukumanzi kwe-substrate surface: I-ether ye-cellulose ine-hydrophilicity enhle kwaye inokuphucula umphumo wokumanzisa kwesisombululo kwi-substrate surface, ngaloo ndlela iphucula ukunamathela. Ukumanzisa yenye yezinto eziphambili ezichaphazela ukubambelela. Ngokuphucula ukumanzi, i-cellulose ethers inokukhuthaza izinto zokugquma ukuba zibe manzi ngcono kwaye zigqume umphezulu we-substrate.
Ukuphucula ukubethelwa komatshini: Ifilimu eyenziwe yi-cellulose ether ngexesha lokumisa inomlinganiselo othile wokuguquguquka kunye namandla, okuvumela i-cellulose ether ukuba yenze ukufakwa komatshini kumphezulu we-substrate ukunyusa ukunamathela. Le mpembelelo yokudibanisa i-mechanical ibaluleke kakhulu kwiingubo kunye ne-adhesives, enokuphucula ngokufanelekileyo iimpawu zokubambelela kwizinto eziphathekayo.
3. Inkqubo yokuphucula iimpawu zokwenza ifilim
Iimpawu ezigqwesileyo zokwenza ifilimu: I-ether ye-cellulose inokwenza isisombululo se-high-viscosity efanayo emva kokuchithwa emanzini, kwaye inokwenza ifilimu ecacileyo eqhubekayo emva kokumisa. Le filimu inamandla omatshini kunye nokuguquguquka, inokugubungela ngokufanelekileyo umphezulu we-substrate kwaye iphucule iipropati zokwenza ifilimu. Kwiingubo kunye neengqungquthela zamachiza, iipropati zefilimu ze-cellulose ethers zibaluleke kakhulu.
Ukugcinwa kwamanzi okulungileyo: I-ether ye-cellulose inokugcinwa kwamanzi okubalulekileyo, okunokugcina umswakama ofanelekileyo ngexesha lenkqubo yokubunjwa kwefilimu kunye nokuthintela iziphene zokubunjwa kwefilimu ezibangelwa ukomisa ngokugqithiseleyo. Ukugcinwa kwamanzi kunceda ukwenza i-uniform kunye ne-dense layer yefilimu, ukukhusela ukukrazula kunye nokukhupha ifilimu. Kwiimpahla zokwakha kunye neengubo, iipropati zokugcina amanzi ze-cellulose ethers zinokuphucula kakhulu ukusebenza kokwakhiwa kwezinto kunye nomgangatho wokugqibela wokwenza ifilimu.
Lawula isantya sokumisa: I-ether ye-cellulose inokulungelelanisa izinga lokunyuka kwamanzi ngexesha lenkqubo yokuqulunqwa kwefilimu, okwenza inkqubo yokwakheka kwefilimu ilawuleke ngakumbi. Ngokulawula isantya sokumisa, i-cellulose ether inokuthintela ukuxinzezeleka koxinzelelo olubangelwa ukomisa ngokukhawuleza kwefilimu, ngaloo ndlela kuphuculwe umgangatho kunye nokuzinza kwefilimu. Kwishishini lamachiza, i-cellulose ethers isoloko isetyenziselwa ukugquma iziyobisi, ezinokuthi zilawule ngokufanelekileyo isantya sokumisa somgca wokugquma kunye nokuqinisekisa ukufana kunye nokunyaniseka komgangatho wokugquma.
4. Imizekelo yokusetyenziswa
Udaka lokwakha: Ukongeza i-HPMC kwidaka lokwakha kunokuphucula kakhulu ukubambelela kunye nokusebenza kokwakhiwa kodaka. Ngokusebenzisa imiphumo yayo yokuqina kunye nokugcina amanzi, i-HPMC iphucula i-adhesion ye-interface phakathi kodaka kunye nesiseko sezinto eziphathekayo, kwaye iphucula iipropati zokwenza ifilimu yodaka, okwenza udaka lube lula ngexesha lenkqubo yokwakha kwaye lomelele emva kokubunjwa kwefilimu.
Ipeyinti: Ukongeza i-cellulose ether kwipeyinti esekwe emanzini kunokuphucula umgangatho kunye neepropati zokwenza ifilimu yepeyinti, okwenza i-coating ibe lula kwaye ilula. Ngokusebenzisa iipropathi zayo ezibalaseleyo zokwenza ifilimu kunye nokugcinwa kwamanzi, i-cellulose ether iqinisekisa ukuba i-coating yenza i-dense kunye ne-uniform layer yefilimu ngexesha lokumisa, ukuphucula ukubambelela kunye nokuqina kwengubo.
Ukugquma kwamayeza: Kwinkqubo yokugquma amayeza, ii-cellulose ethers ezifana ne-HPMC zihlala zisetyenziselwa ukwenza umaleko wokugquma. Iimpawu ezintle zokwenza ifilimu ye-cellulose ether kunye nokukwazi ukulawula isantya sokumisa kunokuqinisekisa ukufana kunye nokunyaniseka komgca wokugubungela kunye nokuphucula ukuzinza kunye nokukhululwa kweempawu zeziyobisi.
I-ether ye-cellulose ineempembelelo ezibalulekileyo ekuphuculeni ukubambelela kunye neempawu zokwenza ifilimu ngokuqiniswa kwayo, ukugcina amanzi, kunye neempawu zokwenza ifilimu. Ukusetyenziswa kwayo okubanzi kulwakhiwo, iingubo, amayeza kunye nezinye iinkalo zibonakalisa ngokupheleleyo indima yayo ebalulekileyo ekwandiseni ukubambelela kunye neepropati zokwenza ifilimu. Kwixesha elizayo, ngokuphuculwa okuqhubekayo kweteknoloji yokuvelisa i-cellulose ether kunye nokuphuhliswa kweemveliso ezintsha ze-cellulose ether, i-cellulose ether iya kubonisa amathuba okusebenza ngokubanzi kwiinkalo ezininzi.
Ixesha lokuposa: Jul-13-2024